#643E66
Closest named color: Brownish Purple (#76424E). oklch(42.4% 0.08 325.1), rgb(100, 62, 102).
Aa
White text reads best on this color (8.66:1).
About this color
#643E66 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.080 and its hue 325°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Brownish Purple (#76424E), ΔE 0.058 away. White text reads best on it, at 8.66:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.080) |
| Temperature | in between |
| Nearest name | Brownish Purple (#76424E) |
| Black text | 2.42:1 |
| White text | 8.66:1 |
Values
| HEX | #643E66 |
| RGB | rgb(100, 62, 102) |
| HSL | hsl(297, 24%, 32%) |
| OKLCH | oklch(42.4% 0.08 325.1) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #643E66 | 8.66:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #643E66 | 2.42:1 | Fails | Lc 14.4 | Not readable |
| #643E66 text on white | 8.66:1 | AAA | Lc 89.6 | Fine for body text |
| #643E66 text on black | 2.42:1 | Fails | Lc -12.7 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.
-
Step 50
50
#F8F4F8
oklch(97.1% 0.007 325.6)
-
Step 100
100
#EFE7EF
oklch(93.7% 0.014 325.7)
-
Step 200
200
#E2D4E3
oklch(88.6% 0.025 323.8)
-
Step 300
300
#D1B7D1
oklch(81% 0.046 326)
-
Step 400
400
#B991BA
oklch(70.7% 0.074 325.5)
-
Step 500
500
#A775A9
oklch(63.1% 0.095 325.3)
-
Step 600
600
#925D94
oklch(55.6% 0.103 325.6)
-
Step 700
700
#7C4C7F
oklch(49.1% 0.097 324.8)
-
Step 800
800 (this color)
#643E66
oklch(42.4% 0.08 325.1)
-
Step 900
900
#523654
oklch(37.7% 0.062 324.4)
-
Step 950
950
#302031
oklch(27.1% 0.038 324.6)
#643E66 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #3A4867 | 0.074 |
| Deuteranopia (no green cones) | #444D65 | 0.067 |
| Tritanopia (no blue cones) | #66424D | 0.047 |
| Achromatopsia (no color) | #4B4B4B | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643E66
#643E66
oklch(42.4% 0.08 325.1)
- #305932
#305932
oklch(42.3% 0.079 145.1)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #643E66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brownish Purple #76424E ΔE 0.058
- Purple Brown #673A3F ΔE 0.063
- Dusty Grape #545775 ΔE 0.071
- Dusk #4E5481 ΔE 0.072
- Twilight #4E518B ΔE 0.077
- Dark Slate Blue #483D8B ΔE 0.081
- Dark Mauve #874C62 ΔE 0.082
- Light Eggplant #894585 ΔE 0.088
Use #643E66 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.